13564261 has 4 divisors (see below), whose sum is σ = 13571712. Its totient is φ = 13556812.

The previous prime is 13564259. The next prime is 13564279. The reversal of 13564261 is 16246531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16246531 = 7 ⋅2320933.

It is a cyclic number.

It is not a de Polignac number, because 13564261 - 2¹ = 13564259 is a prime.

It is a super-2 number, since 2×13564261² = 367978352952242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13564211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026 + ... + 5308.

It is an arithmetic number, because the mean of its divisors is an integer number (3392928).

Almost surely, 2^13564261 is an apocalyptic number.

It is an amenable number.

13564261 is a deficient number, since it is larger than the sum of its proper divisors (7451).

13564261 is an equidigital number, since it uses as much as digits as its factorization.

13564261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7450.

The product of its digits is 4320, while the sum is 28.

The square root of 13564261 is about 3682.9690468425. The cubic root of 13564261 is about 238.4873672415.

The spelling of 13564261 in words is "thirteen million, five hundred sixty-four thousand, two hundred sixty-one".